summaryrefslogtreecommitdiff
path: root/commits.go
blob: d69cc2bd5ad3552f8fa5af716ff3a7e752062709 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
package main

import (
	"fmt"
	"github.com/KatolaZ/git2go"
	"golang.org/x/crypto/openpgp"
	"os"
	"strings"
//	"log"
)

func CommitToString(commit *git.Commit) string {

	var ret string

	ret += fmt.Sprintf("type: %s\n", commit.Type())
	ret += fmt.Sprintf("Id: %s\n", commit.Id())
	ret += fmt.Sprintf("Author: %s\n", commit.Author())
	ret += fmt.Sprintf("Message: %s\n", commit.Message())
	ret += fmt.Sprintf("Parent-count: %d\n", commit.ParentCount())

	return ret
}

// FIXME: RETURN THE ENTITY PROVIDED BY THE CHECK, OR nil
func check_signature(commit *git.Commit, keys []*openpgp.KeyRing) (signature, signed string, err error) {
	
	signature, signed, err = commit.ExtractSignature()

	if err == nil {
		for _, keyring := range keys {
			
			_, err_sig :=
				openpgp.CheckArmoredDetachedSignature(*keyring, strings.NewReader(signed),
				strings.NewReader(signature))
			
			if err_sig == nil {
				fmt.Printf("Good signature \n")
				return signature, signed, nil
			}
			err = err_sig
		}
	}
	
	return "", "", err
}


// traverse all the commits between two references, looking for scorsh
// commands
// fixme: we don't have just one keyring here....
func walk_commits(msg SCORSHmsg, w *SCORSHworker) error {

	fmt.Printf("Inside parse_commits\n")

	reponame := msg.repo
	old_rev := msg.old_rev
	new_rev := msg.new_rev

	repo, err := git.OpenRepository(reponame)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Error while opening repository %s (%s)\n",
			reponame, err)
		return SCORSHerr(SCORSH_ERR_NO_REPO)
	}

	old_rev_oid, err := git.NewOid(old_rev)

	oldrev_commit, err := repo.LookupCommit(old_rev_oid)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Commit: %s does not exist\n", old_rev)
		return SCORSHerr(SCORSH_ERR_NO_COMMIT)
	}

	new_rev_oid, err := git.NewOid(new_rev)

	newrev_commit, err := repo.LookupCommit(new_rev_oid)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Commit: %s does not exist\n", new_rev)
		return SCORSHerr(SCORSH_ERR_NO_COMMIT)
	}

	cur_commit := newrev_commit

	for cur_commit.Id().String() != oldrev_commit.Id().String() {

		commit, err := repo.LookupCommit(cur_commit.Id())
		if err == nil {

			fmt.Printf("%s", CommitToString(commit))
			// We should look for scorsh-tags, and if the commit has any,
			// check if it can be verified by any of the keyrings associated
			// with the scorsh-tag
			
			//signature, signed, err := check_signature(commit, &keyring)
			//_, _, err := check_signature(commit, w.keys)
			//if err != nil {
			//	log.Printf("%s\n", SCORSHerr(SCORSH_ERR_SIGNATURE))
			//	
			//}
			cur_commit = commit.Parent(0)
		} else {
			fmt.Printf("Commit %x not found!\n", cur_commit.Id())
			return SCORSHerr(SCORSH_ERR_NO_COMMIT)
		}
	}
	return nil
}